JP2022138452A - Hot water control device - Google Patents

Abstract

To provide a hot water control device which can enhance energy efficiency in a variety of multiple dwelling houses.SOLUTION: A hot water control device 1 for controlling a hot water system 100 having a plurality of heat source machines 2 for producing hot water by heating fluid circulating in a common flow passage 41, and a plurality of hot water consumption devices 9 connected to a plurality of branch paths 91 which are branched from one hot water tap path 43 in which hot water heated by the plurality of heat source machines 2 circulates, comprises: a control unit for controlling a circulation flow passage of the fluid circulating to the common flow passage 41; a thermal load data acquisition unit for acquiring thermal load data related to one hot water system 100 having the plurality of hot water consumption devices 9; a storage unit for storing a plurality of thermal load data; and a setting unit for setting an operation condition of the control unit at the different hot water system 100 by referring to the thermal load data which are stored in the storage unit.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hot water supply controller for controlling a hot water supply system for collective housing.

2. Description of the Related Art Conventionally, there is known a hot water supply system that generates hot water by heating water using a plurality of heat source machines in order to supply hot water to hot water consuming devices in each unit of an apartment building (see, for example, Patent Document 1). This hot water supply system uses multiple heat source devices to heat water, so energy efficiency is improved by controlling the number of heat source devices. It is possible.

The hot water supply system described in Patent Document 1 includes a heat source machine composed of a water heater, and a circulation path for circulating hot water between a plurality of heat source machines, a hot water storage tank, and a faucet (hot water consumption device) of each house. A multi-controller is provided for controlling the temperature of hot water supplied to the faucet of each house by driving or stopping the circulation pump installed in the circulation path according to the temperature of the hot water in the hot water storage tank.

JP 2013-148298 A

The multi-controller described in Patent Document 1 only drives or stops the circulation pump according to the hot water temperature of the hot water storage tank, so even if the hot water consumption of the entire housing complex is small, the heat source equipment can generate a certain amount of heat. continue to supply. Although energy consumption can be reduced by controlling the number of heat source units according to hot water consumption, the output load of each heat source unit remains unchanged, and there is room for improvement in terms of increasing energy efficiency. rice field. In particular, in newly constructed housing complexes, since the total hot water consumption is unknown, it is necessary to operate multiple heat source units at the rated output, and energy efficiency tends to deteriorate.

Therefore, there is a demand for a hot water supply control device capable of improving energy efficiency in various housing complexes.

A hot water supply control apparatus according to the present invention is characterized by a plurality of heat source machines that heat hot water flowing through a common flow path to generate hot water, and one heat source machine through which the hot water heated through the plurality of heat source machines flows. A hot water supply control device for controlling a hot water supply system having a plurality of hot water consuming devices respectively connected to a plurality of branch paths branching from a hot water supply path, the controller controlling a circulation flow rate of hot water flowing through the common flow path. a heat load data acquisition unit for acquiring heat load data relating to one hot water supply system having a plurality of hot water consuming devices; a storage unit for storing a plurality of the heat load data; a setting unit that refers to heat load data and sets operating conditions of the control unit in different hot water supply systems.

In this configuration, heat load data relating to a hot water supply system provided in a certain housing complex is acquired, and a plurality of heat load data corresponding to various housing complexes are stored. Then, the setting unit refers to the plurality of heat load data, and sets the operating conditions of the control unit that controls the circulation flow rate of hot water heated by the heat source equipment in, for example, a hot water supply system for a newly built collective housing.

In other words, even if there is no heat load data required for control or it is not acquired throughout the year, the operating conditions of the control unit are set by the setting unit, so it is necessary to operate all heat source units at a constant output. It is possible to realize a hot water supply system with high energy efficiency. In this way, it is possible to provide a hot water supply control device capable of improving energy efficiency in various housing complexes.

In another characteristic configuration, the hot water outlet path communicates with a hot water storage tank that stores hot water, and includes a first circulation path upstream of the branch path and a second circulation path downstream of the branch path. The common flow path connects the hot water storage tank and the plurality of heat source devices, and the control unit controls the first temperature of the hot water flowing through the first circulation path and the second circulation path. The point is that the circulation flow rate is controlled so that the difference from the second temperature of the circulating hot water is within a predetermined range.

In this configuration, the heat load of the hot water consumption device can be determined from the difference between the first temperature and the second temperature, so the circulation flow rate supplied to the heat source equipment is controlled according to this heat load. In other words, if the difference between the first temperature and the second temperature is controlled to be within a predetermined range, when the heat load is high, the circulation flow rate is increased to ensure the output heat amount of the heat source equipment and the necessary amount for each house. hot water supply, and when the heat load is low, the circulation flow rate is reduced to lower the output heat amount of the heat source equipment, thereby reducing the energy consumption. Therefore, the heat source equipment can improve energy efficiency without excessive heat supply.

Another characteristic configuration is that the setting unit sets the operating conditions based on installation conditions under which the hot water supply system is installed.

As in this configuration, if the setting unit refers to heat load data with similar installation conditions, such as the size and area of the collective housing, it will be possible to control the hot water supply more closely to the actual situation. However, it is possible to improve energy efficiency from the start.

In another characteristic configuration, the installation conditions include an outside air temperature and a water temperature, and the setting unit generates corrected heat load data by correcting the heat load data to be referred to based on the outside air temperature and the water temperature. , the operating conditions are set based on the corrected heat load data.

By generating corrected heat load data based on the outside air temperature and water temperature as in this configuration, it is possible to set more appropriate operating conditions.

1 is a conceptual diagram of a hot water supply system; FIG. It is a block diagram showing a hot water supply control device. It is a hot water supply control flowchart. FIG. 4 is an explanatory diagram relating to setting of operating conditions;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a hot water supply control device according to the present invention will be described below based on the drawings.

A hot water supply system 100 according to the present embodiment shown in FIG. 1 is installed in an apartment complex in which a plurality of dwelling units exist in one building. This hot water supply system 100 generates hot water by heating hot water (an example of a fluid) with a plurality of water heaters 2 (an example of heat source equipment), and supplies the hot water to a hot water consumption device 9 provided in each dwelling unit. supply. The hot water supply control device 1 in this embodiment controls the operation of a plurality of hot water supply systems 100 installed in each housing complex. The hot water supply control device 1 may be a part of a computer provided in a management center that centrally manages the state of the hot water supply system 100 at a remote location, or may be a control mechanism that functions as a part of the hot water supply system 100. There may be, or a combination thereof may be used. The hot water supply control device 1 is configured by cooperation of hardware and software centered on a CPU, memory, etc., for executing various processes.

[Basic configuration of hot water supply system]
The hot water supply system 100 includes a hot water consumption device 9 provided in each unit of an apartment building, a plurality of water heaters 2 (an example of a heat source device) that generate hot water to be supplied to the hot water consumption device 9, and a plurality of water heaters 2 that generate hot water. and a hot water storage tank 3 for storing hot water generated by heating. This hot water supply system 100 returns hot water generated by heating hot water stored in a hot water storage tank 3 with a plurality of water heaters 2 to the hot water storage tank 3, and supplies the hot water from the hot water storage tank 3 to each of the hot water consumption devices 9. do. Hot water supply system 100 is configured to be capable of mutual communication with hot water supply control device 1 by wire or wirelessly, and operation is controlled by hot water supply control device 1 .

The plurality of water heaters 2 are connected in parallel, and heat hot water flowing through one hot water circulation path 41 to generate hot water. Incidentally, each water heater 2 may be connected in series. Further, the heat source device that heats hot water to generate hot water is not limited to the water heater 2, and various devices that provide heat such as a fuel cell, a gas engine cogeneration device, an electric heat pump device, and a solar heat collector can be used. can be used.

The water heater 2 has a pipe 22 inside a casing 21, and the pipe 22 is provided with a heat exchanger 23 as a heat source for supplying hot water. This gas water heater 2 performs a hot water supply function by applying heat obtained from combustion flames of combustion gas such as city gas 13A supplied from gas pipe 24 to hot water flowing through pipe 22 by means of heat exchanger 23. It is a vessel.

The hot water storage tank 3 stores the thermal energy of the plurality of water heaters 2 (that is, stores heat with hot water as a heat medium) and causes the hot water to flow out from the branch passage 91 to the hot water consumption device 9 via the hot water discharge pipe 42. is configured as A water supply pipe 45 for supplying tap water is connected to the lower portion of the hot water storage tank 3, and the inside of the hot water storage tank 3 is filled with hot water.

One hot water circulation path 41 (an example of a common flow path) for circulating hot water between the hot water tank 3 and the plurality of water heaters 2 is connected to the hot water tank 3 . That is, the hot water stored in the hot water storage tank 3 circulates between the plurality of water heaters 2 and the hot water storage tank 3 through the hot water circulation path 41 . A circulation pump P is provided in the middle of the hot water circulation path 41, and by changing the driving force of the circulation pump P, the circulation flow rate of the hot water flowing through the hot water circulation path 41 can be changed. The hot water circulation path 41 is provided so that the hot water taken out from the lower part of the hot water storage tank 3 returns to the upper part of the hot water storage tank 3 via the plurality of water heaters 2 . That is, the relatively low-temperature hot water taken out from the lower part of the hot water storage tank 3 recovers heat with the plurality of water heaters 2, and the relatively high-temperature hot water recovered from the heat discharged from the plurality of water heaters 2 is , returns to the upper part of the hot water storage tank 3 . As a result, in the hot water storage tank 3, hot water is stored with a temperature stratification such that relatively high temperature hot water is stored in the upper portion and relatively low temperature hot water is stored in the lower portion. .

A hot water supply pipe 42 is connected to the upper part of the hot water storage tank 3 to supply high temperature hot water. Relatively high-temperature hot water stored in the hot water storage tank 3 is discharged from the hot water outlet pipe 42 . A regulating valve 6 is connected to the hot water supply pipe 42 , and the adjustment valve 6 mixes relatively high temperature hot water discharged from the hot water storage tank 3 through the hot water supply pipe 42 with relatively high temperature hot water supplied through the water supply pipe 45 . low-temperature water flows in. The hot water supply control device 1 controls the operation of the regulating valve 6 so that the temperature of the hot water flowing from the regulating valve 6 to the hot water outlet passage 43 on the downstream side reaches the hot water outlet target temperature (for example, 30 to 45° C.). Alternatively, the adjustment valve 6 may be omitted and the hot water outlet pipe 42 and the hot water outlet path 43 may be directly connected.

The adjustment valve 6 is a valve member composed of a three-way valve or the like for controlling the amount of hot water flowing through the hot water supply pipe 42 and the combined amount of water from the water supply pipe 45 . As the valve member used for the adjustment valve 6, a rotary valve, an electromagnetic valve, or the like can be used. The adjustment valve 6 adjusts the opening degrees of the hot water supply pipe 42 and the water supply pipe 45 according to instructions from the hot water supply control device 1 . That is, the hot water supply control device 1 controls the adjustment valve 6 so that the hot water outlet pipe 42 is in an open state, thereby enabling hot water to be delivered to the hot water consumption device 9 through the hot water outlet 43, and supplying water based on the target hot water outlet temperature. Controls the degree of communication opening of the pipe 45 . On the other hand, when stopping the hot water supply to the hot water consumption device 9, the hot water supply controller 1 cuts off the hot water supply pipe 42 on the hot water storage tank 3 side and adjusts the valve position of the adjustment valve 6 so that the water supply pipe 45 side is fully opened. keep under control. That is, when stopping the hot water supply to the hot water consumption device 9 , the adjustment valve 6 is in a valve position that allows the water in the water supply pipe 45 to flow through the hot water supply pipe 42 . Information relating to the valve position of the regulating valve 6 is output to the hot water supply control device 1 .

The water supply pipe 45 is provided with a tap water temperature sensor Sw for measuring the tap water temperature. The hot water circulation path 41 is provided with a hot water temperature sensor Sa for measuring the hot water temperature Ta on the upstream side of the water heater 2, and a target temperature for measuring the target hot water temperature Tb on the downstream side of the water heater 2. A sensor Sb is provided. Further, the hot water circulation path 41 is provided with a flow rate sensor Sv for measuring the circulation flow rate V of hot water flowing through the hot water circulation path 41 . The hot water outlet path 43 includes a first circulation path 43a connected to the hot water outlet pipe 42 from the hot water storage tank 3 storing hot water to the branch path 91, and a second circulation path 43b from the branch path 91 to the hot water storage tank 3. I'm in. That is, the hot water outlet path 43 communicates with the hot water storage tank 3 that stores hot water, and includes a first circulation path 43a on the upstream side of the branch path 91 and a second circulation path 43b on the downstream side of the branch path 91. I'm in. The first circulation path 43a is provided with a pre-heat-recovery temperature sensor Sc for measuring the outlet hot water temperature T1 before heat recovery is performed by the hot water consumption device 9, and the second circulation path 43b is provided with the hot water consumption device. 9, a post-heat-recovery temperature sensor Sd is provided for measuring the return temperature T2 of hot water after heat recovery. These tap water temperature sensor Sw, hot water temperature sensor Sa, target temperature sensor Sb, pre-heat recovery temperature sensor Sc, and post-heat recovery temperature sensor Sd include, for example, thermocouples, and information relating to temperatures detected by the thermocouples. is output to the hot water supply control device 1 . The flow rate sensor Sv is composed of, for example, a propeller type flow meter, and outputs information regarding the flow rate detected by the flow meter to the hot water supply control device 1 .

A plurality of hot water consuming devices 9 are connected to a plurality of branch passages 91 branched from one hot water outlet passage 43 through which hot water heated by a plurality of water heaters 2 flows. The hot water consumption device 9 is used for hot water supply, heating, and the like. When the hot water consumption device 9 is used for hot water supply, the consumed hot water is not returned to the hot water storage tank 3 . When the hot water consuming device 9 is used for heating, only the heat contained in the hot water is consumed and the hot water returns to the hot water storage tank 3. - 特許庁The branch 91 may be provided with an auxiliary heat source device (not shown) composed of a heat exchanger such as a water heater to reheat the hot water flowing through the branch 91 . When the temperature of the hot water flowing out from the upper part of the hot water storage tank 3 is lower than the temperature of the hot water required by the hot water consuming device 9, the auxiliary heat source device is operated so that the temperature of the hot water supplied to the hot water consuming device 9 reaches the desired temperature. Control the temperature.

[Hot water supply controller]
As shown in FIGS. 1 and 2, the hot water supply control device 1 controls the operation of a plurality of hot water supply systems 100 installed in each housing complex. The hot water supply control device 1 has a communication unit 11 (an example of a heat load data acquisition unit), a control unit 12 , a storage unit 13 , a setting unit 14 and a learning unit 15 .

The communication unit 11 is configured with a communication interface capable of wired communication or wireless communication with the hot water supply system 100 . This communication unit 11 is provided in a management center that centrally manages the state of the hot water supply system 100 at a remote location.

The control unit 12 controls the operation of the hot water supply system 100, but in this embodiment, mainly controlling the circulation flow rate V of hot water flowing through the hot water circulation path 41 will be described. Although this control unit 12 is provided in the management center, a part of the function may be assigned to hot water supply system 100 .

The control unit 12 controls the pre-heat-recovery temperature sensor according to the total amount of heat consumed by the hot water consuming devices 9 provided in each unit of the housing complex (thermal load Q of the housing complex) based on the arithmetic expression of formula (1). Circulate so that the difference between the outlet heated water temperature T1 measured by Sc and the return temperature T2 measured by the post-heat recovery temperature sensor Sd is within a predetermined range (for example, 20° C.≦(T1−T2)≦30° C.). Control the flow rate V. Here, the heat load Q of the housing complex can be obtained by operating the hot water supply system 100 under certain conditions (for example, a constant output of the water heater 2 and a constant circulation flow rate V).
Q = (T1-T2) x V x calorie conversion factor α Formula (1)
Q: Total amount of heat consumed by hot water consumption device 9 (heat load of housing complex)
T1: Hot water outlet temperature before heat recovery through first circulation path 43a T2: Return temperature after heat recovery through second circulation path 43b V: Circulation flow rate V of hot water circulation through hot water circulation path 41
α: 4.182

The control unit 12 also controls the hot water temperature Ta circulating from the hot water storage tank 3 to the water heater 2 in the hot water circulation path 41 and the hot water temperature Tb of the hot water circulating from the water heater 2 to the hot water storage tank 3 in the hot water circulation path 41. , and the circulation flow rate V, the number of operating water heaters 2 and the amount of combustion gas supplied are controlled in a manner proportional to (Tb−Ta)×V. Here, the hot water temperature Tb is a preset target temperature (for example, 35 to 50° C.) as the hot water temperature to be stored in the upper portion of the hot water storage tank 3 . That is, the control unit 12 determines the number of operating water heaters 2 and the amount of combustion gas supplied based on the circulation flow rate V set by the above-described formula (1) and the hot water temperature Ta measured by the hot water temperature sensor Sa. to control.

The storage unit 13 is configured by a storage medium that stores installation conditions and heat load data for each of the plurality of hot water supply systems 100 . The installation conditions include installation area, environmental information (outside temperature, tap water temperature, etc.) of the area, building age, number of dwelling units, number of installed water heaters 2, and the like in the collective housing provided with the hot water supply system 100 . The heat load data is time-series data in an apartment house equipped with the hot water supply system 100, and includes the usage status (date, time period, simultaneous usage rate, etc.) of the hot water consuming devices 9, the number of operating water heaters 2, Outflow hot water temperature T1 (an example of the first temperature) measured by the temperature sensor Sc, return temperature T2 (an example of the second temperature) measured by the temperature sensor Sd after heat recovery, hot water circulation path 41 measured by the flow rate sensor Sv and a circulating flow rate V of hot water that circulates. The simultaneous use rate is the rate at which the hot water consuming devices 9 of each household are used at the same time on a predetermined date and time.

Setting unit 14 refers to the heat load data stored in storage unit 13 to set operating conditions for control unit 12 in different hot water supply systems 100 . Further, setting unit 14 sets operating conditions based on the installation conditions under which hot water supply system 100 is installed. As an example, as shown in FIG. 4, the setting unit 14 compares the installation conditions of the housing complexes A to D stored in the storage unit 13 with the installation conditions of the newly built housing complex X, and finds similar installation conditions. is extracted. Then, the setting unit 14 refers to the heat load data of the collective housing B and sets the operating conditions of the control unit 12 in the newly constructed collective housing X. FIG. Specifically, the setting unit 14 sets the same operating condition as the heat load data to be referred to (circulation flow rate V for each time zone of the housing complex B stored in the storage unit 13). Then, based on the set circulation flow rate V, the control unit 12 controls the hot water temperature Tb to be the target and the hot water temperature Ta to be proportional to (Tb−Ta)×V. Control the number of units in operation and the amount of combustion gas supplied. Note that the circulation flow rate V once set is calculated at predetermined intervals (for example, every other day) based on the heat load Q acquired for a predetermined period (for example, one day) using the formula (1) at 20 ° C. ≤ ( It may be corrected so that T1-T2)≦30.degree.

When setting the operating conditions, for example, based on the outside air temperature and water temperature as the installation conditions, the heat load data to be referred to (the heat load Qb and the circulation flow rate V of the housing complex B stored in the storage unit 13) are corrected. Heat load data (heat load Qa of collective housing X) may be generated, and operating conditions may be set based on the corrected heat load data. Specifically, as shown in Equation (2), the heat load Qa of the housing complex X is corrected in proportion to the difference between the average water temperature of the housing complex B and the average water temperature of the housing complex X. Then, using the corrected thermal load Qa of the collective housing X as an operating condition, the control unit 12 adjusts the circulation flow rate V so that 20° C.≦(T1−T2)≦30° C. in Equation (1), ( The number of operating water heaters 2 and the amount of combustion gas supplied are controlled in a form proportional to Tb-Ta)×V. This correction is performed so that the absolute value of (average outside temperature of apartment complex B - average outside temperature of apartment complex X) is a predetermined value (for example, 5 ° C) or more, and (average water temperature of apartment complex B - average water temperature of apartment complex X ) is equal to or greater than a predetermined value (for example, 5° C.).
Qa = Qb + (average water temperature of housing complex B - average water temperature of housing complex X) x V x calorific value conversion factor α
... formula (2)

Further, the setting unit 14 may refer to the heat load data of the collective housing acquired by the communication unit 11 and change the operating conditions of the control unit 12 in the collective housing. For example, if the average water temperature of the collective housing X corrected by the equation (2) deviates from the actual water temperature, such as in winter, the operating conditions are changed. As an example, in the same collective housing, if the variation in outside temperature between days and seasons is a predetermined value (for example, 5°C) or more, and the variation in tap water temperature is a predetermined value (for example, 5°C) or more, the Corrected heat load data may be generated by correcting the heat load Qc. Specifically, as shown in Equation (3), the post-correction heat load Qd of the collective housing is corrected in proportion to the difference between the average water temperature of the collective housing and the actual water temperature of the collective housing. At this time, the setting unit 14 sets the actual heat load in the housing complex derived from the usage status (date, time zone, simultaneous usage rate, etc.) of the hot water consumption device 9 and the number of operating water heaters 2, and the corrected heat load. If the load Qd is similar, the thermal load Qc of the housing complex may be updated as the thermal load Qd.
Qd = Qc + (Average water temperature of housing complex - Actual water temperature of housing complex) x V x Calorific value conversion factor α
... formula (3)

The learning unit 15 learns the operation conditions of the control unit 12 based on the installation conditions of the housing complex. The learning unit 15 performs machine learning, for example, using the installation conditions of the collective housing as input data and the heat load Q and circulation flow rate V of the collective housing as output data. This machine learning is learning with teacher data, in which heat load data of a plurality of hot water supply systems 100 stored in storage unit 13 are referred to to set operating conditions of control unit 12 in different hot water supply systems 100 . Note that the learning unit 15 may be omitted, and for example, the setting unit 14 may perform filtering based on only the number of dwelling units and the number of heat source units, and refer to heat load data of similar housing complexes.

Next, mainly referring to FIG. 3, a control method of the hot water supply control device 1 in the hot water supply system 100 of the newly constructed housing complex will be described.

Hot water supply control device 1 acquires heat load data in hot water supply system 100 of a plurality of collective housing through communication unit 11, and stores the data in storage unit 13 (#31). Next, the setting unit 14 searches whether or not there is an apartment complex having installation conditions similar to those of the newly constructed apartment complex, and if there is an apartment complex having similar installation conditions (#32 YES determination), and refer to the heat load data in the hot water supply system 100 of the collective housing (#33). In the example shown in FIG. 4, since the existing collective housing B and the newly constructed collective housing X are similar in terms of the number of dwelling units and the number of heat source units, the heat load data of the collective housing B is referred to. Then, the setting unit 14 sets the operating conditions of the control unit 12 in the newly built collective housing X based on the heat load data of the collective housing B referred to. Specifically, the setting unit 14 corrects the heat load data to be referred to (the heat load Qb and the circulation flow rate V of the housing complex B stored in the storage unit 13) using the above-described formula (2). Set operating conditions based on

On the other hand, if there is no housing complex having similar installation conditions (#32 NO determination), the operation conditions of the controller 12 in the newly built housing complex X are to maximize the circulation flow rate V and set all the water heaters 2 to the rated output. Set (#34). The operating conditions set in #33 and #34 are transmitted to the hot water supply system 100 of the newly built collective housing X via the communication unit 11, and the hot water supply system 100 is operated based on the operating conditions (#35). The circulating flow rate V set in this manner is obtained at predetermined intervals (for example, every other day) based on the heat load Qa of the collective housing X acquired for a predetermined period (for example, one day) using the formula (1): Correction is made so that 20°C ≤ (T1-T2) ≤ 30°C.

Next, the communication unit 11 acquires the actual heat load data and installation conditions (actual outside air temperature and actual water temperature) in the newly built housing complex X (#36). Next, for example, if the outside air temperature fluctuation in apartment complex X is greater than or equal to a predetermined value (eg, 5°C) and the tap water temperature fluctuation is greater than or equal to a predetermined value (eg, 5°C), the operating conditions of residential complex X are changed. (#37 YES determination). When changing the operating conditions, the setting unit 14 calculates the corrected thermal load Qd of the collective housing X based on the above-described formula (3), and uses this corrected thermal load Qd as the operating condition of the collective housing X. , and the operating conditions are reset as corrected heat load data (#38). At this time, the thermal load Qd after correction and the actual thermal load may be compared, and the operating conditions of the collective housing X may be reset only when they are approximate. These processes of #35 to #38 are repeated at predetermined intervals (for example, one week) until the heat load data for one year in the newly built housing complex X can be acquired.

[Other embodiments]
<1> In the above-described embodiment, the setting unit 14 sets the operating conditions of the control unit 12 based on the installation conditions of the collective housing. can be For example, when the heat load of the housing complex can be predicted in advance, the setting unit 14 refers to a plurality of heat load data stored in the storage unit 13 and sets the operating conditions of the control unit 12 based on similar heat load data. can be set. In addition, the setting unit 14 refers to a plurality of heat load data in a plurality of housing complexes, stores the heat load Q-circulation flow rate V map in the storage unit 13, and stores heat load data of different housing complexes acquired in real time. The operating condition (circulation flow rate V) of the control unit 12 may be set according to the load.

<2> The hot water storage tank 3 in the above-described embodiment is omitted, and hot water generated by heating tap water (an example of a fluid) in a plurality of water heaters 2 is directly supplied to the hot water consumption device 90. Also good.

<3> In formulas (2) and (3) in the above-described embodiment, the tap water temperature is used when the setting unit 14 calculates the corrected heat load data. good.

<4> In the above-described embodiment, examples of control performed in hot water supply system 100 have been described with specific numerical values, but these numerical values are described for illustrative purposes and can be changed as appropriate.

It should be noted that the configurations disclosed in the above-described embodiments can be applied in combination with configurations disclosed in other embodiments as long as there is no contradiction. Moreover, the embodiments disclosed in this specification are merely examples, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a hot water supply control device that controls a hot water supply system for collective housing.

1: Hot water supply control device 2: Water heater (heat source machine)
3: Hot water storage tank 9: Hot water consumption device 11: Communication unit (heat load data acquisition unit)
12: Control unit 13: Storage unit 14: Setting unit 41: Hot water circulation path (common flow path)
43: hot water outlet 43a: first circulation 43b: second circulation 90: hot water consuming device 91: branch 100: hot water supply system T1: outlet hot water temperature (first temperature)
T2: return temperature (second temperature)
V: circulation flow rate

Claims (4)

A plurality of heat source machines for heating a fluid flowing through a common flow path to generate hot water, and a plurality of branch paths branching from one hot water outlet path through which the hot water heated by the plurality of heat source machines is connected respectively. A hot water supply control device for controlling a hot water supply system having a plurality of hot water consuming devices, comprising:
a control unit that controls the circulation flow rate of the fluid that circulates in the common flow path;
a heat load data acquisition unit that acquires heat load data relating to one hot water supply system having a plurality of hot water consuming devices;
a storage unit that stores a plurality of the heat load data;
a setting unit that refers to the heat load data stored in the storage unit and sets operating conditions of the control unit in different hot water supply systems. The hot water outlet path communicates with a hot water storage tank that stores hot water, and includes a first circulation path on the upstream side of the branch path and a second circulation path on the downstream side of the branch path,
The common flow path connects the hot water storage tank and the plurality of heat source machines,
The control unit controls the circulation flow rate so that a difference between a first temperature of hot water flowing through the first circulation path and a second temperature of hot water flowing through the second circulation path is within a predetermined range. The hot water supply control device according to claim 1. 3. The hot water supply control device according to claim 1, wherein the setting unit sets the operation condition based on installation conditions under which the hot water supply system is installed. The installation conditions include outside air temperature and water temperature,
4. The setting unit according to claim 3, wherein the setting unit generates corrected heat load data obtained by correcting the heat load data to be referred to based on the outside air temperature and the water temperature, and sets the operating conditions based on the corrected heat load data. hot water controller.

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